Amp Build: Ceriatone Kraken 50

Marshall Amp Discussion

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FourT6and2
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Joined: Wed May 31, 2017 11:11 pm

Re: Amp Build: Ceriatone Kraken 50

Post by FourT6and2 »

All done!

Just doing some testing now. I'm using a 47K 5W pot wired as a variable dropping resistor. This way, I just clip it to the filter cap and I can tune all the voltages in the amp. Typical value is 10K. I set it to 18K, which is what the Yeti uses (higher voltages). And my B+ is a whopping 515vdc! That's without power tubes though. Once I stick some in, it'll probably come down a bit. I don't really have a set goal in mind. But I'll play it with a few of the resistor values I have on hand and figure out which one to use.

I also got some new Tefzel hookup wire in some fancy colors for the next build. And I'm going to try to make the lead dress a little better next time around. I wanted to get this one done so I can start testing a few things first, tone wise.

Current voltages with no power tubes and 18K dropping resistor:

MAINS: 124.4VAC
AC FILAMENTS: 3.47VAC
DC FILAMENTS: 6.09VDC
BIAS/PI SPLITTERS: -50 to -36VDC
PT SECONDARY: 375VAC

V1:
1: 151VDC
2: SIGNAL
3: 1.47VDC
4: FILAMENT
5: FILAMENT
6: 274VDC
7: SIGNAL
8: 2.47VDC
9: FILAMENT

V2:
1: 226.1VDC
2: SIGNAL
3: 1.26VDC
4: FILAMENT
5: FILAMENT
6: 381.5VDC
7: 226.1
8: 228VDC
9: FILAMENT

V3:
1: 257.3VDC
2: 26.2VDC
3: 42.24VDC
4: FILAMENT
5: FILAMENT
6: 245.2VDC
7: 27.6VDC
8: 42.24VDC
9: FILAMENT

V4/V5:
1: 0
2: FILAMENT
3: 511VDC - 515VDC
4: 509VDC
5: -50VDC
6: 509VDC
7: FILAMENT
8: 0

B+: 515VDC
SECOND CAP AFTER DROPPER (18K): 381VDC
BOARD CAP AFTER DROPPER: 366.8VDC
V1a: 151.7VDC
V1b: 274VDC

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xtian
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Re: Amp Build: Ceriatone Kraken 50

Post by xtian »

Beauty, mate.
I build and repair tube amps. http://amps.monkeymatic.com
FourT6and2
Posts: 178
Joined: Wed May 31, 2017 11:11 pm

Re: Amp Build: Ceriatone Kraken 50

Post by FourT6and2 »

Here's a clip. This is with a 10K dropping resistor. Probably my favorite value so far. The volume is as loud as I can get it without clipping the mic on my laptop, sorry lol. I'm working to upload the other clips with different voltages too. But it takes a long time for YT to process 'em. I'm still toying with a few parts here and there.




Voltages in this clip are:

MAINS: 123VAC

AC FILAMENTS: 3.33
DC FILAMENTS: 6.0

BIAS SPLITTERS: -50 to -36VDC

PT SECONDARY AT RECTIFIER: 370

HT: 490

V1:
1: 176
2: SIGNAL
3: 1.45
4: FILAMENT
5: FILAMENT
6: 297
7: SIGNAL
8: 2.43
9: FILAMENT

V2:
1: 231
2: SIGNAL
3: 1.43
4: FILAMENT
5: FILAMENT
6: 406
7: 231
8: 232
9: FILAMENT

V3:
1: 270
2: 29.5
3: 48.75
4: FILAMENT
5: FILAMENT
6: 258
7: 31.5
8: 48.75
9: FILAMENT

V4/V5:
1: 0
2: FILAMENT
3: 490
4: 485
5: -50VDC
6: 489
7: FILAMENT
8: 0
FourT6and2
Posts: 178
Joined: Wed May 31, 2017 11:11 pm

Re: Amp Build: Ceriatone Kraken 50

Post by FourT6and2 »

Some cleans-ish


FourT6and2
Posts: 178
Joined: Wed May 31, 2017 11:11 pm

Re: Amp Build: Ceriatone Kraken 50

Post by FourT6and2 »

New clips. Made a few other changes. I think it sounds much better now. Just trying to decide on a slope resistor.

33K:



35K:



39K:

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romberg
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Location: Lafayette, CO
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Re: Amp Build: Ceriatone Kraken 50

Post by romberg »

Nice looking build! Sounds good.
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JoshBernstein
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Location: Key Largo, FL USA

Re: Amp Build: Ceriatone Kraken 50

Post by JoshBernstein »

Great looking build! What kind of resistors and pots have you got in that Solano build (which looks awesome as well!)
Not really
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M Fowler
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Location: Walcott ND

Re: Amp Build: Ceriatone Kraken 50

Post by M Fowler »

I'm just going to send customers photos of your amps and then tell them this is what is under the hood of your amp so no need to remove the chassis from the cabinet.
They will of course receive my substandard bastardization construction method of amplifier building.

Good name for an amp as well Kraken!

Mark
Last edited by M Fowler on Fri Jan 11, 2019 10:40 pm, edited 1 time in total.
FourT6and2
Posts: 178
Joined: Wed May 31, 2017 11:11 pm

Re: Amp Build: Ceriatone Kraken 50

Post by FourT6and2 »

JoshBernstein wrote: Thu Dec 20, 2018 4:51 pm Great looking build! What kind of resistors and pots have you got in that Solano build (which looks awesome as well!)
Thanks :)

The SLO Clone I built a few years ago? I used whatever the real SLO has. I forgot exactly. I think PEC pots and Vishay CCF60 resistors.
M Fowler wrote: Sat Dec 22, 2018 6:54 pm I'm just going to send customers photos of you amps and then tell them this is what is under the hood of your amp so no need to remove the chassis from the cabinet.
They will of course receive my substandard bastardization construction method of amplifier building.

Good name for an amp as well Kraken!

Mark
lol thanks
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Reeltarded
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Location: GA USA

Re: Amp Build: Ceriatone Kraken 50

Post by Reeltarded »

Deep slope is my fave. Bet 47k even better. We have a litte gain to burn!

Great amps from you, always. Very nice!
Signatures have a 255 character limit that I could abuse, but I am not Cecil B. DeMille.
FourT6and2
Posts: 178
Joined: Wed May 31, 2017 11:11 pm

Re: Amp Build: Ceriatone Kraken 50

Post by FourT6and2 »

Reeltarded wrote: Sun Dec 23, 2018 3:09 pm Deep slope is my fave. Bet 47k even better. We have a litte gain to burn!

Great amps from you, always. Very nice!
Thanks :)

This thread is old, though. I think my more recent build sounds better.
studiodunn
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Re: Amp Build: Ceriatone Kraken 50

Post by studiodunn »

^^^Amp building goals ^^^
Super nice build as usual!
BobSimpson
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Joined: Fri Oct 06, 2017 10:35 pm

Re: Amp Build: Ceriatone Kraken 50

Post by BobSimpson »

Hi.
Nice looking build.
So where do you source the PRP resistors?
I haven't found a distributor around these parts.

Bob Simpson
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M Fowler
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Joined: Wed Jan 16, 2008 2:19 am
Location: Walcott ND

Re: Amp Build: Ceriatone Kraken 50

Post by M Fowler »

BobSimpson wrote: Thu Jan 10, 2019 4:01 am Hi.
Nice looking build.
So where do you source the PRP resistors?
I haven't found a distributor around these parts.

Bob Simpson
https://www.partsconnexion.com/prp-resistors.html

http://www.soniccraft.com/index.php/prp ... 1500503749
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